Many countries experience the most intense heat of 11,300 years
Shaun Marcott, a scientist at the University of Oregon in the US, and his colleagues used the tiny ancient fossils they found on the ocean floor to model the average globalEarth's temperature changes abnormally hot and cold
The Earth is currently experiencing an unusually sudden change in temperature, from the coldest to the lowest peak in the shortest time in history, in just 100 years.